Which to use
“co” is a noun and “cz” is a conjunction - they look or sound alike but fill different roles in a sentence.
- #617
- “co” frequency rank
- #30,387
- “cz” frequency rank
- 31004
- confusion score
Side-by-Side Comparison
| Feature | co | cz |
|---|---|---|
| Definition | Clipping of company. | Abbreviation of 'cause (because). |
Letter map: co vs cz
Shared letters muted; letters that set co and cz apart highlighted. Shared run: 1.
Grammar separator: co vs cz
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: co is anoun and czaconjunction. On the page they differ by a single letter - o in “co” becomes z in “cz”. Our composite confusion score for this pair is 31004, derived from the frequency rank of both members and their visual similarity.
co is recorded at frequency rank #617, classified as anoun, pronounced /kəʊ/. cz is at rank #30,387, tagged as aconj.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 31004, this pair ranks #349,854 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of co vs cz
Shared letters: c. Private to "co": o. Private to "cz": z.
"co" · 2 letters · shape CV · "cz" · 2 letters · shape CC
Frequently Asked Questions
Can "co" and "cz" be used interchangeably?
Frequency check: "co" vs "cz" - which ranks higher?
After this comparison
Pair "co" vs "cz" is on the table, pick a follow-up below.
- Full dictionary entry for "co" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "cz" - compare definitions side by side with the headword page. Word entry
- This pair ranks #349,854 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "co" and "cz" also get mixed up with nearby pairs, the highest-scored neighbour is "CGT vs cz". Nearby pair
Confusion rank #349,854 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.